Scaffold



C. BONNET March 14, 1933.

S CAFF OLD Filed May 29, 1930 2 Sheets-Sheet l Swuwwhw C 20 nnei'.

C. BONN ET SCAFFOLD March 14, 1933.

2 Sheets-Sheet 2 Filed May 29. 1930 (Yemeni 5021 21/82 W m m Patented Mar. 14, 1933 UNITED STATES CLEMENT BONNET, OF MENOMINEE, ILLINOIS SCAI'FOLD Application filed m 29, 1930. Serial No. 457,225.

This invention has relation to a structure adapted for general use and embodying a vertically adjustable platform and extensible ladder, the latter affording convenient means for reaching and leaving theplatform when the device is in service.

The invention provides a portable scafiold,

articularly adapted for orchardists and armers, since it admits of ready and con- I venient picking of fruit, repairing buildings and climbing to elevations necessitating the use of a ladder, scaffold or like means.

. While the drawings illustrate a preferred embodiment of the invention, it is to be un- 1 derstood that in adapting the means to meet specific needs and requirements, the design may be varied and changes in the minor details of construction may be resorted to within the scope of the invention as claimed, without departing from the spirit thereof.

. For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which, 1

Figure 1 is an end view of a portable scaffold embodying the invention.

Figure 2 ,is a top plan view thereof.

I Figure 3 is a detail view of the lower portion of the mast and part of the wagon bed,

showing the yieldable connection therebetween.

Figure 4 is an elevational view of the adjustable platform, the mast, the braces, and the ladder, partly in section, and having portions broken away.

Figure 5 is a side view of the mast, parts being broken away.

Fig. 6 is a detail perspective view showing means for connecting the upper end of the ladder with the upper platform.

, Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

To assure portability, the parts are mount ed upon a wagon which, in its simplest form, embodies a base or bed 1, rear wheels 2, front wheels 3, and a tongue 4 for drawing the wagon from place to place and controlling the front wheels for proper steering. Suitablebrake mechanism is associated with the rear wheels and is adapted to be controlled by means of abrake lever mounted upon the base. The brake mechanism includes drums 5 and bands associated therewith and oper able by means of a brake lever 6.- The brake mechanism prevents accidental movement of the scaffold, particularly when resting upon a grade.

A mast is mounted upon the base and comprises sections 7 and 8 which have a telescopic relation. The mast is mounted to admit of adjustment to occupy a vertical position when the base inclines by reason of the wagon resting upon a sloping surface. Adjustable braces connect the upper part of the section 8 with corner portions of the'base. Each of the braces comprises an upper section 9 and a lower section 10, the sections 9 telescoping the sections 10 and being made secure in the adjusted position by means of clamping screws 11. The upper ends of the sections 9 are pivoted to the-upper end of the section 8 and the lower ends of the sections 10 are pivoted to the base or'wagon bed 1. Open coil springs 75 12 are grouped about the foot of the mast. Bolts or rods 13- pass through the springs 12 and are connected at their lower ends to the bed 1 of the wagon and their upper ends engage over the top coils of the springs. Other bolts or rods 14 similarly pass through the coil springs 12 and are connected at their upper ends to the mast and their lower ends are engaged about the bottom coils of the springs, as shown most clearly in Figure 3 of the drawings. The s rings 12 and bolts 13 and 14 provide a yielda le connection between the mast and the bed 1, whereby said mast may be readily adjusted.

A platform 15 is provided at the upper end of the mast and is attached to the top of the upper section 7 and is adjustable vertically therewith. This platform may beof any size and constructiomdepending upon the particular use for which the scaffold is adapted. An elevating screw 16 passes through the upper section 7 of the mast and is connected thereto by means of a swivel joint, as indicated most clearly in Figure 4 of the drawings. A hand wheel 18 is applied to the upper 100 projecting end of the elevating screw 16 for convenience of rotating the same when raising or lowering the platform. A nut 19 is located within the upper end of the section 8 and is connected thereto by screws 20. Slots 21 are formed in opposite sides of the section 7 to receive the stems of the screws 20 and, incidentally, the screws 20 and slots 21 prevent rotation of the section 7 and the platform 15 carried thereby. Braces 22 are interposed between the outer portion of the platform 15 and the section 7 of the mast.

An extensible ladder forms part of the scaffold and comprises telescoping sections 23 and 24, the upper section 23 being connected to the platform 15 in any preferred manner and the lower section 24 being connected to the bed or base 1 in any way. The ladder sec tions 23 and 24 have a telescopic engagement and the ladder is extended or contracted as the platform 15 is elevated or lowered. The

ladder provides convenient means for reaching the platform 15 or leaving the same. The

platform is raised or lowered by rotatlng the elevating wheel 18, as will be readily appreciated.

The upper and lower ends of the extensible ladder may be connected to the platform and the base, respectively, in any approved manner, as has been stated, there obviously being a slight angular movement of the ladder relative to the platform and the base as the plat form and base are adjusted. I have provided blocks 25 upon the platform, at the edge of the same, which blocks project beyond the edge of the platform at the inner sides of the respective side bars of the ladder at the upper ends thereof, and pivot bolts 26 are inserted through the projecting ends of these blocks and the sides of the ladder while the lower end of the ladder is connected to the base by hinges 27.

What is claimed is:

1. A scaffold comprising a mast including telescoping sections, a platform carried by the upper section, an elevating screw within the mast swiveled to the upper section, a nut fixed within the lower section and engaging the elevating screw, and means above the plaform for rotating the elevating screw for raising or lowering the platform as required.

2. A scaffold comprising a base, an extensible mast thereon, yieldable connecting means between the mast and base, extensible braces between the mast and base, a platform at the upper end of the mast, an elevating screw within the mast swiveled to the upper section of the mast, and a nut within the lower section of the mast and engageable by the elevating screw.

3. The combination of a base, a meet risat its upper end to a side of the platform and,

at its lower end to a side of the base.

In testimony whereof I affix my signature.

CLEMENT BONNET. [145.]

ing therefrom and comprising upper and lower sections, a platform on the upper end of the mast, means for extending or contracting the mast, extensible yieldable couplings 

